Other than the agate piece which may be a Scraper the rest of the pieces look like water worn rocks.
Washington archaeologists state that artifacts found on Puget Sound beaches that were made from petrified wood, and probably the agate, were brought here from Eastern Washington (from the other side of the Cascade Mountain range), or from the Columbia River/Oregon area. And of course being found on a tidal beach means all my arrowheads, scrapers, etc. 'everything' is water worn.
Besides obvious arrowheads, scrapers, etc. searching the 'pea gravel' beach means looking for anything larger than small gravel, anything that is not rounded like a marble or oval shaped, anything that has an un-natural shape, and anything else that doesn't 'belong there' - like petrified wood (see petrified wood arrowhead from the beach in photo below).
I've personally surface collected over a thousand specimens of petrified wood from 14 Eastern Washington locations, and several Columbia River locations -> petrified wood does not naturally have these fracture or wear patterns.
The very least they can be is something that was tossed because they weren't working out right or unfinished. Or maybe they are finished tools to extract oil from the fat of a sea lion, or to tenderize a goeduck, or ...
Rich.